... 3.ISO9001:2000 4.High precision,high loading Product DescriptionLinear guide is consisted of rail, block, rolling elements, retainer, recirculator, seal ... motion. We have two kinds of linear guides, ball guide(Model: GGB) and roller guide(Model: GZB), and accuracy with 2, 3, 4, 5 ... grades. Grade 5 is the normal most simple one. Roller guide: GZB ...